Hemoptysis (plural: hemoptyses) refers to coughing up of blood. Generally, it appears bright red in color as opposed to blood from the gastrointestinal tract which appears dark red. It is considered an alarming sign of a serious underlying etiology.

Massive hemoptysis is referred to as expectoration of >100-600 mL of blood over a 24 hour period 6.

In 90% of cases, the source of bleeding is the bronchial artery. In the remainder of cases, either the pulmonary artery or another non-bronchial artery (e.g. intercostalinternal thoracic) is the source of bleeding. 

The following are the most common causes:

Other causes:

Rarer causes:

This approach can be followed for small amounts of blood or streaks of blood in sputum. The underlying cause can be life-threatening; however, it is not an emergency.

Bronchoscopy followed by a contrast-enhanced CT scan must be carried out to detect the cause. The above-mentioned common causes and certain uncommon and rare causes must be kept in mind.

  • examine the patient to rule out a non-pulmonary cause of bleeding, such as from the upper airway or gastrointestinal tract
  • confirm and localize the site of bleed with bronchoscopy
  • CT imaging may help in characterization of lesions if time permits
    • CT arterial angiogram of the thoracic aorta should be considered in certain scenarios, particularly in patients with known cystic fibrosis 
      • provides definitions of the bronchial arteries anatomy and recruited aortobronchial collaterals 8
  • DSA angiography will help localize the vessels involved and also enable embolization
  • after stabilization of the patient, further imaging can be carried out and appropriate measures are taken to prevent rebleeding

Article information

rID: 28535
Section: Gamuts
Tag: shetty
Synonyms or Alternate Spellings:
  • Hemoptyses
  • Hemoptysis

Support Radiopaedia and see fewer ads

Cases and figures

  • Case 1: from tracheal invasion of thyroid tumor
    Drag here to reorder.
  • Case 2: NSCLC
    Drag here to reorder.
  • Case 3: bronchial artery aneurysm
    Drag here to reorder.
  • Case 4: Goodpasture syndrome
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.